She drove the car to Lu Yi's house after school. She didn't call him. She must throw the cat today anyhow. She took out a bunch of keys from her pocket and she didn't feel she was in the wrong to have Lu Yi's house keys. They were a couple, so as his girlfriend, she could freely come in and out of his house.
But she seemed to forget that Lu Yi never told her about the keys and he never gave her his house keys. Fang Zhu knew fairly well that Lu Yi didn't forget to give her key, but that he didn't want to. She wanted to have her privacy, but she forgot that everyone wanted to have their privacy as well.
She protected her privacy well, but she was free to spy on others.
Perhaps this was the common fault among teachers. They wanted to be firmly in charge of the students and grasp them in their hands. What they could do or couldn't do, they must follow the teachers' habits and ideas.
Otherwise, the student wouldn't behave well and was not likeable.
